Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: OS partition is inaccessible and Windows won't boot

10 Mar 2013   #11
gregrocker

 

So you turned off the controller which RAIDs the 32gb cache drive (actually a chip on the HD or mobo) so you could install Ubuntu onto it? This is tricky even when we try to do it with Win7 so all bets are off if you also imposed GRUB on it. GRUB does not always play well with Win7.

Your Disk Mgmt shows the large OS partition is marked Active but does not have the Boot flag which in Partition Wizard means the System Boot files are not booting correctly. System is the flag in Disk Mgmt, Boot means the same thing in PW.

So to fix this make sure the Win7 HD is set first to boot in BIOS setup, boot into Win7 DVD to run Startup Repair - Run up to 3 Separate Times, report back what it finds.

Check also in BIOS setup what any EFI settings are, including Legacy BIOS and Compatibility Support Module.

You'll need to read the Manual for your specific mobo or PC to see how to work the cache drive back in, which may require turning back on the Controller to RAID it again then running Recovery. But every PC/mobo is different with this feature. What we've helped do here is unRAID it by turning off the controller to install Win7 on it when users insist this is what they want, in spite of how pitifully small an SSD it is.


My System SpecsSystem Spec
.
10 Mar 2013   #12
znut

Windows 7 Home Premium x64
 
 

Thank you for your help. That diagnosis sounds right, although breaking the RAID and installing Ubuntu was accidental. I'll report back. I can worry about reCaching the drive later.
My System SpecsSystem Spec
10 Mar 2013   #13
znut

Windows 7 Home Premium x64
 
 

The first two pictures are my current bios settings. The boot order ect has probably changed.

The remaining three pictures are disk/partition status after running the recovery 3 times. It does not recognize that the main partition, let alone the partition is bootable, and it says it's raw.


Attached Thumbnails
OS partition is inaccessible and Windows won't boot-0310031644a.jpg   OS partition is inaccessible and Windows won't boot-0310031644.jpg   OS partition is inaccessible and Windows won't boot-0310031742.jpg   OS partition is inaccessible and Windows won't boot-0310031748.jpg   OS partition is inaccessible and Windows won't boot-0310031750.jpg  

My System SpecsSystem Spec
.

10 Mar 2013   #14
znut

Windows 7 Home Premium x64
 
 

This is probably why it recognizes the c drive but won't do anything with it. I looked at it's properties and tried to disk check it, but had no luck.

As for the startup repair, I'm not really sure what it was trying to do. It ran very briefly and seemed to fix it, however when it reboots the system has a boot error.

It says it used chkdsk to repair it, however I've already tried using chkdsk and it would spit back out that the partition was of an unknown volume and state.

One more thing, I tried to convert the "raw" partition to ntfs, but cmd responded saying that the partition was already ntfs.


Attached Thumbnails
OS partition is inaccessible and Windows won't boot-0310031735.jpg   OS partition is inaccessible and Windows won't boot-0310031736.jpg   OS partition is inaccessible and Windows won't boot-0310031736a.jpg   OS partition is inaccessible and Windows won't boot-0310031729.jpg   OS partition is inaccessible and Windows won't boot-0310031730b.jpg  

My System SpecsSystem Spec
10 Mar 2013   #15
gregrocker

 

Your HD has no UEFI boot partition even though the BIOS is set to UEFI mode. This means that it can't boot or repair. Did you change the BIOS setting to UEFI from Legacy BIOS mode?

Is the HD booting in MBR mode which means it was installed without UEFI in Legacy Mode? You can check this now by seeing what it allows for conversion (without doing so) when you rightclick on the area in the red box below:



If it says Convert to GPT Disk you have an MBR HD which means it could not have been installed in UEFI mode. You can Disable UEFI mode and enable Legacy BIOS or Compatibility Support Module (CSM) to see if it will repair using the steps I gave you earlier which are to repair a Win7 install in Legacy BIOS mode on an MBR disk.

If you're completely blind about UEFI and need to understand it better before proceeding, watch this video first:

My System SpecsSystem Spec
10 Mar 2013   #16
znut

Windows 7 Home Premium x64
 
 

I don't think my bios gives me these options. I changed a few things but they didn't seem to work. At this point, I'm just going to have my school's tech support recover what ever dates they can then just wipe the drive and reinstall windows. This is getting too involved for me. Is this a plausible solution?
My System SpecsSystem Spec
10 Mar 2013   #17
gregrocker

 

Probably the best course since trying to install an OS on the 32gb SSD cache is extremely complex even when it isn't done accidentally.

You can try to rescuiing your data now to an external USB using Copy & Paste - in Windows Recovery Console or Paragon Rescue Kit Free Edition 11.0 Free CD.

If this succeeds you can also try running Lenovo One-Key Factory Recovery from boot which is Chapter 3 in the Manual here. In fact I'd read the entire manual: http://download.lenovo.com/consumer/...12_english.pdf
My System SpecsSystem Spec
10 Mar 2013   #18
znut

Windows 7 Home Premium x64
 
 

Alright. Thank you very much for your help. It is greatly appreciated.
My System SpecsSystem Spec
10 Mar 2013   #19
gregrocker

 

No prob. Keep us posted on how it goes. We see at least one of these SSD cache issues per week since they came out.
My System SpecsSystem Spec
11 Mar 2013   #20
benjy206

Windows 7 Ultimate 64-bit
 
 

I don't know if the problem is solved or not. But I had the same problem with a linux install. As when i installed it as a dual boot it wouldn't let me dual boot just striaght into the linux OS. What i had to do was use hirens and mini windows xp to access it and delete two partitions as it creates partitions that is not regonised by MS so when i went in through this i could see the hidden partitions and everything was good again.
My System SpecsSystem Spec
Reply

 OS partition is inaccessible and Windows won't boot




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Data Drive Partition - Inaccessible after installing W7 on new SSD
I thought I was doing good by keeping my data on a second partition of my OS drive. That way if my OS crashed my data would be still in tack on the second volume. I mean as long as the hdd didnít crash that is. I installed a new SSD and begin to install Windows on it. I donít remember...
General Discussion
Windows will not boot Error: required device inaccessible
Hi all Hope someone can help me My windows 7 hdd will not boot up. I get an error message saying: The boot selection failed because a required device is inaccessible Now I have tried startup recovery several times with no luck.
Installation & Setup
Blew fuse at home, Windows won't boot, HDD "inaccessible"
Well title says it all. Blew a fuse accidentally, went outside when I turned it back on. When I came back I realized that Windows won't boot giving me 0xc0000225 error. What options do I have? HDD seems to be working fine and I see it in BIOS. So far only tried switching SATA ports.
General Discussion
oxc000000e Boot failed-required device is inaccessible (Windows 7)
hi. i get this error when turn on my laptop (idealpad y460) . the boot selection failed because a required device is inaccessible ...oxc000000e how i can fix it? i don't have CD/DVD recovery windows. how i can download it? please help me. http://i.imgur.com/qB1wJ.jpg
Installation & Setup
Linux Partition Not Displaying, Inaccessible
I upgraded my system from Windows Vista to Win 7, 32bit professional edition. I had a partition set aside for Linux Ubuntu. Now, I cannot access Linux from the boot menu, as I used to. It is still listed as an option at boot, but highlighting it and hitting return/enter just causes a black...
Hardware & Devices
Hard Drive Healthy and a Primary Partition but inaccessible
I've just installed windows 7 ultimate 64 bit on my new laptop and when I checked my computer only one local disk was visible. When I checked disk management, this was the one shown. The disk has no name and file type. http://imageshack.us/photo/my-images/810/harddriveproblem.jpg/ I don't...
Hardware & Devices


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 11:36.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App